[tjkeenan4]

Hi All,

I just purchased the legendary 105mm F/2.4 Takumar for my Pentax 67II and it arrived from a dealer in Japan. I purchased the 45mm as well and tested both lenses.

The 45mm works perfectly with surprising sharp rendering. However the 105 F/2.4 seems to have 'reversed' itself - meaning that the infinity focal length is blurry and the shortest lengths - like 40 cm are relatively sharp. And this for a 'tested' and 'mint' lens...from Japan.

I took the 105mm and put it on my Pentax 645 N II with adaptor and had the same results. I check the diopter and everything else I can think of and I am both stumped and disappointed.

Has this happened to any of you?

Thanks,

Tom

[RICHARD L.]

I purchased my late-model Pentax 67 105 mm f/2.4 new, locally, and it performs perfectly at infinity on my Pentax 67 II as well as on my digital 645Z with adapter. I include a digital image magnified 2X taken with a 645Z. Your copy may be defective and should be returned to the seller. This is one of the sharpest lenses in the P67 offerings.

[tjkeenan4]

Thank you

[D1N0]

Maybe it has been cleaned and an element was reversed.

Lens lay out should be like this:


The rear element would be the most likely culprit

[RICHARD L.]

the shortest lengths - like 40 cm are relatively sharp.

The minimum focusing distance is 100 cm (1 meter) on the P67 105 mm f/2.4. How can it be "sharp at 40 cm" ??

[ProfessorBuzz]

Any chance there is a Marumi or other reducer "close-up" lens on the front where the filter would go? Otherwise likely the lens was reassembled incorrectly.

[RICHARD L.]

TJKEENAN4

Have you solved your problem finally ? Is it a close-up lens left on the front of the lens or what ?

Regards